How to do Valve replacement on megane scenic?

Replacing the valves on a Renault Megane Scenic involves several steps. First, you need to remove the cylinder head by disconnecting various components such as the intake and exhaust manifolds, timing belt, and any electrical connections. Once the head is off, you can access the valves, which will require removing the valve springs and retainers. After replacing the faulty valves, reassemble the head, ensuring proper torque specifications, and reinstall it onto the engine. Always refer to a service manual for specific instructions and torque settings.